215421430052 has 24 divisors (see below), whose sum is σ = 384129345600. Its totient is φ = 105670494176.

The previous prime is 215421430039. The next prime is 215421430069. The reversal of 215421430052 is 250034124512.

It is a junction number, because it is equal to n+sod(n) for n = 215421429997 and 215421430024.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3608099 + ... + 3667317.

It is an arithmetic number, because the mean of its divisors is an integer number (16005389400).

Almost surely, 2^215421430052 is an apocalyptic number.

It is an amenable number.

215421430052 is a deficient number, since it is larger than the sum of its proper divisors (168707915548).

215421430052 is a wasteful number, since it uses less digits than its factorization.

215421430052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76435 (or 76433 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 215421430052 its reverse (250034124512), we get a palindrome (465455554564).

The spelling of 215421430052 in words is "two hundred fifteen billion, four hundred twenty-one million, four hundred thirty thousand, fifty-two".